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|Name 2 types of interference that can apply to sound waves. How is sound affected by each type?
|When a compression of one wave overlaps a compression of another wave, constructive interference. When a compression of one wave overlaps a rarefaction of another wave, destructive interference.
|Is it possible for one sound wave to completely cancel another so that no sound is left? Explain.
|Yes, interference can cause dead spots in auditoriums where reflected sound waves destructively interfere with unreflected waves.
|Why does destructive interference occur when the path lengths from 2 identical sources differ by half a wavelength?
|The rarefaction of one wave matches the compression of another = no sound
|What causes beats?
|When 2 tones of slightly different frequency are sounded together a regular fluctuation in the loudness of the combined sounds is heard.
|What is the beat frequency when 494 HZ tuning fork and 496 Hz tuning fork are sounded together?